Date and Time Remain in Background - Enlarged - After Swiping for Startup

At power-on, the date and time appear on the screen - normal size. After swiping the screen to get to the main widgets page, the Date and Time appears in the background in an enlarged font, such that only Date/Time image overflow the screen area. The main page of widgets are visible, but are hard to see due to the Date/Time residual image. The background wallpaper is also displayed.

This appeared suddenly the other day when the phone was removed from a pocket.. Power-off-on recycling didn't help. Is there some setting that might have been invoked when the phone was being carried? I tried cycling the date/time settings, but this had no effect either.